CPU卡以其良好的安全性和规范性被日益广泛的应用于各种嵌入式系统，本文介绍了用MSP430 单片机来开发CPU卡的读写操作，分析了其硬件和软件的设计-CPU card with its good safety and normative being increasingly widely used in various embedded systems, this paper describes the use of MSP430 MCU to develop CPU card read and write operations, analysis of its hardware and software design